cover 1855 (c.) entire (no marks of origin) to Hamburg, marked "via Trieste", bearing 4a. blue and red 4th printing pair (outer frameline touched at right) cancelled with diamond of hollow dots, showing manuscript "6¼" and "8" in blue with arrival d.s. on reverse; the entire a little worn at edges. B.P.A. Certificate (1993) states the cover cleaned to remove staining. A rare franking. Photo